403 lines
13 KiB
C#
403 lines
13 KiB
C#
using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Linq;
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using Unity.WebRTC;
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using Unity.WebRTC.Samples;
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using UnityEngine;
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using UnityEngine.UI;
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using Button = UnityEngine.UI.Button;
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[Serializable]
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class EncoderParameters
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{
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[SerializeField] public Dropdown optionMaxBitrate;
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[SerializeField] public Dropdown optionMinBitrate;
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[SerializeField] public Dropdown optionScaleResolution;
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}
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class SimulcastSample : MonoBehaviour
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{
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#pragma warning disable 0649
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[SerializeField] private Button startButton;
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[SerializeField] private Button callButton;
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[SerializeField] private Button restartButton;
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[SerializeField] private Button hangUpButton;
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[SerializeField] private Camera cam;
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[SerializeField] private RawImage sourceImage;
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[SerializeField] private RawImage receiveImage;
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[SerializeField] private Transform rotateObject;
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[SerializeField] private EncoderParameters[] encoderParameters = new EncoderParameters[3];
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#pragma warning restore 0649
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private RTCPeerConnection _pc1, _pc2;
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private MediaStream videoStream, receiveStream;
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private RTCRtpTransceiver _pc1Transceiver;
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private DelegateOnIceConnectionChange pc1OnIceConnectionChange;
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private DelegateOnIceConnectionChange pc2OnIceConnectionChange;
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private DelegateOnIceCandidate pc1OnIceCandidate;
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private DelegateOnIceCandidate pc2OnIceCandidate;
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private DelegateOnTrack pc2Ontrack;
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private DelegateOnNegotiationNeeded pc1OnNegotiationNeeded;
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private bool videoUpdateStarted;
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private ulong[] optionBitrate = new ulong[] { 100, 150, 200, 300, 400, 600, 800, 1100, 1400 };
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private int[] optionScaleResolution = new[] { 1, 2, 4, 8 };
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private void Awake()
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{
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startButton.onClick.AddListener(OnStart);
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callButton.onClick.AddListener(Call);
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restartButton.onClick.AddListener(RestartIce);
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hangUpButton.onClick.AddListener(HangUp);
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receiveStream = new MediaStream();
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}
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private void Start()
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{
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callButton.interactable = false;
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restartButton.interactable = false;
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hangUpButton.interactable = false;
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pc1OnIceConnectionChange = state => { OnIceConnectionChange(_pc1, state); };
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pc2OnIceConnectionChange = state => { OnIceConnectionChange(_pc2, state); };
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pc1OnIceCandidate = candidate => { OnIceCandidate(_pc1, candidate); };
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pc2OnIceCandidate = candidate => { OnIceCandidate(_pc2, candidate); };
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foreach (var paramters in encoderParameters)
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{
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paramters.optionMaxBitrate.options = optionBitrate.Select(bitrate => new Dropdown.OptionData { text = bitrate.ToString() }).ToList();
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paramters.optionMinBitrate.options = optionBitrate.Select(bitrate => new Dropdown.OptionData { text = bitrate.ToString() }).ToList();
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paramters.optionScaleResolution.options = optionScaleResolution.Select(scaleResolution => new Dropdown.OptionData { text = $"1/{scaleResolution}" }).ToList();
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}
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encoderParameters[0].optionMaxBitrate.value = 1; // 150
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encoderParameters[0].optionMinBitrate.value = 0; // 100
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encoderParameters[0].optionScaleResolution.value = 2; // 1/4
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encoderParameters[1].optionMaxBitrate.value = 4; // 400
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encoderParameters[1].optionMinBitrate.value = 3; // 300
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encoderParameters[1].optionScaleResolution.value = 1; // 1/2
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encoderParameters[2].optionMaxBitrate.value = 7; // 1100
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encoderParameters[2].optionMinBitrate.value = 6; // 800
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encoderParameters[2].optionScaleResolution.value = 0; // 1/1
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pc2Ontrack = e =>
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{
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receiveStream.AddTrack(e.Track);
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};
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pc1OnNegotiationNeeded = () => { StartCoroutine(PeerNegotiationNeeded(_pc1)); };
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receiveStream.OnAddTrack = e =>
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{
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if (e.Track is VideoStreamTrack track)
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{
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track.OnVideoReceived += tex =>
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{
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receiveImage.texture = tex;
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receiveImage.color = Color.white;
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};
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}
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};
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}
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private void OnStart()
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{
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startButton.interactable = false;
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callButton.interactable = true;
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if (videoStream == null)
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{
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videoStream = cam.CaptureStream(WebRTCSettings.StreamSize.x, WebRTCSettings.StreamSize.y);
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}
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sourceImage.texture = cam.targetTexture;
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sourceImage.color = Color.white;
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}
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private void Update()
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{
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if (rotateObject != null)
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{
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float t = Time.deltaTime;
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rotateObject.Rotate(100 * t, 200 * t, 300 * t);
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}
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}
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private static RTCConfiguration GetSelectedSdpSemantics()
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{
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RTCConfiguration config = default;
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config.iceServers = new[] { new RTCIceServer { urls = new[] { "stun:stun.l.google.com:19302" } } };
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return config;
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}
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private void OnIceConnectionChange(RTCPeerConnection pc, RTCIceConnectionState state)
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{
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Debug.Log($"{GetName(pc)} IceConnectionState: {state}");
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}
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IEnumerator PeerNegotiationNeeded(RTCPeerConnection pc)
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{
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var op = pc.CreateOffer();
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yield return op;
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if (!op.IsError)
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{
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if (pc.SignalingState != RTCSignalingState.Stable)
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{
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Debug.LogError($"{GetName(pc)} signaling state is not stable.");
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yield break;
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}
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yield return StartCoroutine(OnCreateOfferSuccess(pc, op.Desc));
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}
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else
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{
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OnCreateSessionDescriptionError(op.Error);
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}
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}
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private void AddTracks()
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{
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List<RTCRtpEncodingParameters> parameters = new List<RTCRtpEncodingParameters>();
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RTCRtpEncodingParameters encoder = new RTCRtpEncodingParameters();
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encoder = new RTCRtpEncodingParameters();
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encoder.rid = "l";
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encoder.active = true;
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encoder.maxFramerate = 30;
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encoder.maxBitrate = optionBitrate[encoderParameters[0].optionMaxBitrate.value] * 1024;
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encoder.minBitrate = optionBitrate[encoderParameters[0].optionMinBitrate.value] * 1024;
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encoder.scaleResolutionDownBy = optionScaleResolution[encoderParameters[0].optionScaleResolution.value];
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parameters.Add(encoder);
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encoder = new RTCRtpEncodingParameters();
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encoder.rid = "m";
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encoder.active = true;
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encoder.maxFramerate = 30;
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encoder.maxBitrate = optionBitrate[encoderParameters[1].optionMaxBitrate.value] * 1024;
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encoder.minBitrate = optionBitrate[encoderParameters[1].optionMinBitrate.value] * 1024;
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encoder.scaleResolutionDownBy = optionScaleResolution[encoderParameters[1].optionScaleResolution.value];
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parameters.Add(encoder);
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encoder = new RTCRtpEncodingParameters();
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encoder.rid = "h";
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encoder.active = true;
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encoder.maxFramerate = 30;
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encoder.maxBitrate = optionBitrate[encoderParameters[2].optionMaxBitrate.value] * 1024;
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encoder.minBitrate = optionBitrate[encoderParameters[2].optionMinBitrate.value] * 1024;
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encoder.scaleResolutionDownBy = optionScaleResolution[encoderParameters[2].optionScaleResolution.value];
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parameters.Add(encoder);
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RTCRtpTransceiverInit init = new RTCRtpTransceiverInit();
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init.direction = RTCRtpTransceiverDirection.SendOnly;
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init.sendEncodings = parameters.ToArray();
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var track = videoStream.GetTracks().First();
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var transceiver = _pc1.AddTransceiver(track, init);
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if (WebRTCSettings.UseVideoCodec != null)
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{
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var codecs = new[] { WebRTCSettings.UseVideoCodec };
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transceiver.SetCodecPreferences(codecs);
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}
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_pc1Transceiver = transceiver;
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if (!videoUpdateStarted)
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{
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StartCoroutine(WebRTC.Update());
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videoUpdateStarted = true;
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}
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}
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private void RemoveTracks()
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{
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_pc1.RemoveTrack(_pc1Transceiver.Sender);
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var tracks = receiveStream.GetTracks().ToArray();
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foreach (var track in tracks)
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{
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receiveStream.RemoveTrack(track);
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}
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}
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private void Call()
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{
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callButton.interactable = false;
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hangUpButton.interactable = true;
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restartButton.interactable = true;
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foreach (var parameters in encoderParameters)
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{
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parameters.optionMaxBitrate.interactable = false;
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parameters.optionMinBitrate.interactable = false;
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parameters.optionScaleResolution.interactable = false;
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}
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var configuration = GetSelectedSdpSemantics();
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_pc1 = new RTCPeerConnection(ref configuration);
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_pc1.OnIceCandidate = pc1OnIceCandidate;
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_pc1.OnIceConnectionChange = pc1OnIceConnectionChange;
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_pc1.OnNegotiationNeeded = pc1OnNegotiationNeeded;
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_pc2 = new RTCPeerConnection(ref configuration);
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_pc2.OnIceCandidate = pc2OnIceCandidate;
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_pc2.OnIceConnectionChange = pc2OnIceConnectionChange;
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_pc2.OnTrack = pc2Ontrack;
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AddTracks();
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}
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private void RestartIce()
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{
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restartButton.interactable = false;
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_pc1.RestartIce();
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}
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private void HangUp()
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{
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RemoveTracks();
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_pc1.Close();
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_pc2.Close();
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_pc1.Dispose();
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_pc2.Dispose();
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_pc1 = null;
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_pc2 = null;
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callButton.interactable = true;
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restartButton.interactable = false;
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hangUpButton.interactable = false;
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foreach (var parameters in encoderParameters)
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{
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parameters.optionMaxBitrate.interactable = true;
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parameters.optionMinBitrate.interactable = true;
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parameters.optionScaleResolution.interactable = true;
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}
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receiveImage.color = Color.black;
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}
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private void OnIceCandidate(RTCPeerConnection pc, RTCIceCandidate candidate)
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{
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GetOtherPc(pc).AddIceCandidate(candidate);
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Debug.Log($"{GetName(pc)} ICE candidate:\n {candidate.Candidate}");
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}
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private string GetName(RTCPeerConnection pc)
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{
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return (pc == _pc1) ? "pc1" : "pc2";
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}
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private RTCPeerConnection GetOtherPc(RTCPeerConnection pc)
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{
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return (pc == _pc1) ? _pc2 : _pc1;
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}
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private IEnumerator OnCreateOfferSuccess(RTCPeerConnection pc, RTCSessionDescription desc)
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{
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Debug.Log($"Offer from {GetName(pc)}\n{desc.sdp}");
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Debug.Log($"{GetName(pc)} setLocalDescription start");
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var op = pc.SetLocalDescription(ref desc);
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yield return op;
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if (!op.IsError)
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{
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OnSetLocalSuccess(pc);
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}
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else
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{
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var error = op.Error;
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OnSetSessionDescriptionError(ref error);
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yield break;
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}
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var otherPc = GetOtherPc(pc);
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Debug.Log($"{GetName(otherPc)} setRemoteDescription start");
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var op2 = otherPc.SetRemoteDescription(ref desc);
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yield return op2;
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if (!op2.IsError)
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{
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OnSetRemoteSuccess(otherPc);
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}
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else
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{
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var error = op2.Error;
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OnSetSessionDescriptionError(ref error);
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yield break;
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}
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Debug.Log($"{GetName(otherPc)} createAnswer start");
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// Since the 'remote' side has no media stream we need
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// to pass in the right constraints in order for it to
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// accept the incoming offer of audio and video.
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var op3 = otherPc.CreateAnswer();
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yield return op3;
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if (!op3.IsError)
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{
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yield return OnCreateAnswerSuccess(otherPc, op3.Desc);
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}
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else
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{
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OnCreateSessionDescriptionError(op3.Error);
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}
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}
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private void OnSetLocalSuccess(RTCPeerConnection pc)
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{
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Debug.Log($"{GetName(pc)} SetLocalDescription complete");
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}
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void OnSetSessionDescriptionError(ref RTCError error)
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{
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Debug.LogError($"Error Detail Type: {error.message}");
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HangUp();
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}
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private void OnSetRemoteSuccess(RTCPeerConnection pc)
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{
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Debug.Log($"{GetName(pc)} SetRemoteDescription complete");
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}
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IEnumerator OnCreateAnswerSuccess(RTCPeerConnection pc, RTCSessionDescription desc)
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{
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Debug.Log($"Answer from {GetName(pc)}:\n{desc.sdp}");
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Debug.Log($"{GetName(pc)} setLocalDescription start");
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var op = pc.SetLocalDescription(ref desc);
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yield return op;
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if (!op.IsError)
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{
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OnSetLocalSuccess(pc);
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}
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else
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{
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var error = op.Error;
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OnSetSessionDescriptionError(ref error);
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}
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var otherPc = GetOtherPc(pc);
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Debug.Log($"{GetName(otherPc)} setRemoteDescription start");
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var op2 = otherPc.SetRemoteDescription(ref desc);
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yield return op2;
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if (!op2.IsError)
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{
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OnSetRemoteSuccess(otherPc);
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}
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else
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{
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var error = op2.Error;
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OnSetSessionDescriptionError(ref error);
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}
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}
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private static void OnCreateSessionDescriptionError(RTCError error)
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{
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Debug.LogError($"Error Detail Type: {error.message}");
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}
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}
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